Motor mower



Agg. 26, 1941. s. o. DUEMLER MOTOR MOWER 3 Sheets-Sheet l Filed June 17,1940 Q L mv o @Y 9m w Ji zzmlev INVENTOR.

m. N. M T T Aug. 26,A 1941,. s. o. DUEMLER MOTOR MOWER Filed AJune 17,1940 s sheets-sheet 2 I N VEN TOR.

BYV

ATTORNEYS. n

AUS- 26, 1941- s. DuEMLr-:R 2,253,899

` MOTOR MowER Filed June 17, 1940 5 Sheets-Sheet I5 i ,Mm

INVENTOR.

A TTORNEYS.

, it will vbe seen that w the motor., to be hereinafter more fullydescribed,v

Patented Aug. 26, 1941 UNIT-EVD `s'm'rlezs`, v,Plx'rizlv'r- OFFICE:v

' f j '2,253,89955. f' 'I 'V y l Mo'roaMowE'a v w t Samuel Duemler,Pacific Beach, Calif. t Appliances June 17, 1940, serialize. 341,049

' sciame. 'wise-26) This invention relates to motor propelled lawnmowers.' the primary object of the invention being to provide meanswhereby the usual. -lawn mower may be readily and easily converted into.ya power mower, eliminating the necessity Aof making extensivealterations in the construction of the mower to which the motor isattached, in order to mount the power attachment.

An object of the invention is to provide a devvice of this characterincluding a motor support which is so constructed that it may be used inconnection with lawn mowers of various widths and sizes, the devicecomprising mainly an adjustable'frame constructed in such a way that themotor mounted thereon maybe moved to various positions with respect tothe frame to align the pulley mounted on the motor shaft, with the powerpulley of the mower.

With the foregoing and other objects in view, which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it

being understood that changes inthe precise embodiment of the inventionherein described, may

may be adjusted for use in connection with lawn mowers of varioussizes.v l

, Secured to the end bars 5, and depending therefrom, are substantiallyshort.v arms i0, the arms being bolted to the endbars by means -of boltsll. U-bolts indicated at'l2 vextend through the arms I and engage theusual transversely disposed brace rod of a lawn mower frame, the

brace rod being indicated by the reference character Il. i y

The rear of the demountable frame, is supported by means of the legs I4that are bolted to the end bars I. by means of bolts I5, the lower endsof the legsv Il lbeing formed with elongated openings for the receptionof the bolts i8, which bolts also extend through the .rearwardlyextended arms I1 forming a part of the usual lawn be made within thescope of what is claimed,

without departing from the spirit` of the invention.

Referring to the drawings: i Figure 1 is a plan view of a lawnymowerequipped with a demountable frame constructedr `in accordance with theinvention, and ,illustrate 'ing a motor mounted thereon.

Figure 2 is a frontelevational view thereof.

Figure 3 is a side elevational view of the mowerv with the attachmentmounted thereon, one wheel of the mower having been removed toillustrate Athe :pulley used in rotating the blades of the j mower.

Figure-i is a sectional view taken on lined-4 of Figure 3.

through the elongated openings 8, securing the motor to the frame. Itwill also be noted that mower construction, and which provide a supportfor the stationary blade and roller of the usual .lawn mower.- Due tothis construction, it will be seen that the rear portion .of the framemay be `readily moved vertically, to properly adjust the frame.'

The motor, which in the present showing is ofl the electric type,is`indicated by the reference character i8. The motorV includes a pbaselI9 which is formed with openings at its corners,

for theI reception of. the bolts 20 that extend due to the manner ofmountingl the motor, the motor may be adjusted longitudinally. of thetransversely disposed bars'l sov that the pulley jindicated .at 2|,andwhich vismounted on the motor shaft, may be moved into alignment with'l the pulley 22 mounted-on one of the end beams Figure 5 is asectional'fview taken on line l-w-B"v Referring to the drawings indetail, the demountable frame comprises endbars I that are formed withelongated openings l, which are connected by the transversely disposedbars 1 that are As clearly shown by Figure 1 of the drawings,- the bars1 overliethe bars l, 'and bolts lare extended ythrough the registeringelongatedopenings ofthe end bars l and bars-1, securingthe bars 1 to thebars 5. Due to this construction, the frame, which supports alsoprovided with'elongated openings l.

i l. The pulley 22 is disposed on the shaft 23 that `is mounted `in thebearings 2l, there being provided a pulley 2l on the opposite end of theshaft 23 which is in direct alignment with the pulley 26 secured totheusual cutter blade shaft. A belt indicated at 21 operates over vthepulleys 25 and 28, so that rotary movement of the shaft 23,*will betransmitted to the pulley 26 and blade shaft, to operate the blades ofthe mower.

The Pulley 2i is substantially cone-shaped, so

lthat the belt 2 8, which operates over the pulleys 2| and 22, may beoperated at various speeds. It will be seenthat by adjusting the motorto bring one of the smaller portions of the pulley 2| to a positionunder the belt 2l, the speed-of the shaft 22 and consequently the bladeshaft of the mower, may be increased. This adjustment mayl be readilymade by merely loosening the bolts 9 and moving the bars 1longitudinally of the end bars l, and by loosening the bolts 20- andadjusting the motor longitudinally of the bars l".

In mounting the frame, the usual lawn mower wheel at one end of themower is removed, and a tubular shaft such as indicated at 29 and shownmore particularly by Figure 5 of the drawings, is positioned over thestub shaft 30 on which the usual wheel of the mower operates. Thetubular shaft 29 is formed with a reduced end Il and the wheel which hasbeen removed from the stub shaft 30, is positioned over the reduced end3l of the shaft 29, the reduced end being of a diameter equal to thediameter of the shaft 30.

A bolt indicated at l2 extends through the shaft 30 and reduced end Ilof the shaft 29, the bolt providing a support for the disk Il thatengages the wheel, securing the wheel` in position.

By adding the tubular shaft 28 and mounting the wheel of the mowerthereon, a clearance is provided for the pulley 26.

Wires not shown, will of course be connected with the motor and haveconnection with a suitable source of electricity supply. By closing aswitch and completing an electric circuit to the motor, the motor willoperate to rotate the pulleys 2|, 22, 23 and 26, which transmit movementto the blade shaft of the mower.

While I have shown and described an electric motor for driving theblades of the mower, it is to be understood that a small internalcombustion engine may be mounted on'the frame, in lieu of the electricmotor I 8, to accomplish the result as described.

What is claimed'is:

l. A motor attachment for lawn mowers, comprising a frame embodying. endbars having elongated openings, transversely disposed front and rearbars having elongated openings, the ends of the latter bars adapted tooverlie the end bars, bolts extending through the elongated openings andadjustably connecting the bars. means for removably securing the frameto a lawn mower frame, a motor adiustably mounted on the transverselydisposed bars, and means for transmitting movement of the motor to themower blades. 4 v

2. A motor attachment for lawn mowers, comprising a frame embodying endbars, transversely disposed front and rear bars, said bars havingelongated openings, the ends of the transversely disposed bars overlyingthe end bars, bolts extending through the elongated openings of theoverlapped ends of the transverse bars and end bars, leg members securedto theframe and extending downwardly therefrom, means for securing theleg members to the frame of the motor vehicle with which the attachmentis used, a motor adjustably mounted on the transverse bars, and meansfor transmitting movement of the motor to the mower.

' SAMUEL O. DUEMLER.

